Locking device and releasing mechanism for door checks



I N. L. SCHLOSS.- LOCKING DEVICE AND RELEASING MECHANISM FOR DOOR CHECKS.

APPLICATIQON FILED DEC-27,1920.

1A30,192; Patented Sept. 26,1922.

' 16 Inventor: I /Vewf0nLc5c/2/o55 by (aw 4 Atty Patented Sept. 26, 1922.

UNITE LOCKING-DEVICE Amp etamineiqvincnemsm s01. nooa oniicxs Application filed December ments in door check locking and releasing devices and more particularly to' doorf checks having electrically controlled locking devices and alarm" systems provided to cooperate"therewith. H I p d The present invention isadevelopment of that disclosed in my copendingapplication for Letters Patent," filed November 8th, 1920, Serial No'.'t22,559, and contemplates the incorporation of said locking and releasing devices in the construction of a particular type of electrically controlled door locking device which is applicable to any of the welLknown door checks nowin; use to automatically"closejthe door'of offices, stores andbankentrances.

' w The object of this invention is to provide locking mechanism. whichcanbe attached to anyof the well-known types'of door checksyto cooperate with the" main arm of the: latter, to hold a door in its open position against the normal action ofthe'check, and to provide releasing meanswhich may be manually operatedto eflectuate the re-i lease of the main arm'lof the check: and the consequent movement; of the door to ts fclose'djposition. v I p I It has been found that,'in manyestablishinents not equipped with the electrically controlled locking device in connection with the ordinary door check; the advantage of i being able tohold a door in its open position against the normal action of the check, is very desirable, especially in warm weather when a circulation of airaybe encouraged by an :open door." For this reason the locking; and releasing device hereinafter described, may' -be used independently of any other mechanism,"if so desired.

19a. 'se riaifnt, 433,209."

Another objectiof the invention is'to promay be used in connection with the mechan'lsm set forth in the abovementioned application and which, may be acted upon 'ne aee This accomplished by an/extens on "at o ne' end of the pawl to automatloa'lly disengage the locking element check.

This device is especially, valthough not i'iecessarily sol'ely designed, for use with the 'electrically controlled door locking del/'iCQ' Of said earlier application, but if so desired the invention 'Inay be used in onnection fwith the ordinary door check, providingfthe latter is equipped with a 'inain armfhavinga stud'to engage the looking hook of the invention,

"by thesmove nent oi the locking pawl 81- multaneously with the energizing of the ma es 1 nnwron L. sonrosslios new ronic, it; Y} in vide" a releasing and locking device which from' its hold upon the arm of the This stud may be of any form and maybe an independent,"

element attached to the main arm. The locking deviceinay belocated at any convenient position either upon the check or the door frame.

' Thefinventi n features and combination of p arts hereinafter described with reference to the accompanying drawing,wherein Fig. [a substantially {vertical section consists in l the structurah ofthedoor check'locking' device as applied 7 to a door check' and showing the hand is leas ng mechanism attached thereto.

fF 1g. 2 1s a rear televational view 'of the door check locking device showing the stud in engagement withthe releasing hook; I

j Fig 3 is a sectional plan view takenon "the line 3 Q3fof fFig 2 showing the main arm 'in "normally closed position [in dotted lines; and themain arm in open'vposition with the s'tud engaged in the hook release T as shown in full lines; and d Fig. I is side, elevational view of a doorfcheck providedwith the locking and releasing device with the electrically confltrolled' door locking mechanism omitted. t Referring toathe. drawingg l0 denotes the standard door check provided with a main armll ofa particular design required standard-12"above the guard 14 are the electromagnetic coils 15 provided to operate the pawl 16. The outer or free end of the pawl 16 is provided with a 1 'tfape1'ed tooth adapted to engagea series of [ratchet teeth 17 formed upon an arcuate portion 13 of the main arm 11. The pawl l6 'is' pivoted on a transverse rod 19 carried; byjthe frame 12. Theouter edge of the 'arcuate portion 18, of themain arm 11, is p'rovidedwvith alstud 20' adapted to engage a locking device hereinafter described. The

"main arm 1v is pivoted', at 21 to the: 've-rti- I callyj extending shaft of the check; proper.

A spring 22 is provided at the iorw'ard side of the pivot 19 to lift the freeend of the pawl \A suitable opening 12 in the frame '12 afior'ds access to "the ldcking' 'device of the stud 20 and' portion 18 oi the. m'ain arm 11 as the latter moves "arcuately.

' The pawl 16 is provided with an extension i 23 1111 the form of a release, rod which. ex-

"tei'i' ds'thr'ough a suitable opening 24 inthe rearwall' of the frame 12. A pivo'tedhook ,member25 is mounted upon the outer surface of the rear] wall of the frame 12, closely """adjacent the opening 12. The free end of the 1510011 25 notched 'at 25 to: provide an engaging surface to receive the stud 20fhefore referred to. The angular vertical extension 25*[01 the 11001: 25 overlies the outer end of therelease rod 23. Thef o uter edge oi the hook 25 is tapered causing the latter to be raised to clear. the advancing stud 20.

"lo'facilitate the release ofthe main arm 11 'irom the hook 25 WitllOLlt disturbing the electrical 'jmechanism, I provide a hand releaserod 26 movablefin a vertical strap '27 secured to the frame 12. A. knohor button 28 is attached tothe depending'endof the' '30 are indicated inaccordance with the electrical meol'ianism of my said earlier applica- In the operation of the device, I shall not describe the operation disclosed in my coqpending' application of tl ie electrically controlled l0Cl l1'lg d 61flC8, l3Ut will limit the following des ri tion of the operation the specific locking device and release niechlilll lSlll, forming mylnvent on. However, I

. mi ht ,add that theelectromagneti c coils 15,

' which attract the armature 'or' pawl 16, re-

ceive their energy from an electric circuit 30 having a switch or button located at a point some distance from the door and preferably beneath a counter or desk and within convenient reach of the clerk or cashier.

\Vhen it is desired to permit the door to rest in its open position the movement of the main arm 11 will be approximately 90, anditwillbe" apparent that the arcuate portion 189i the latter willhave moved a relative distance which will' bring the stud 20 beneath thebifurcated end 25 of the hook 25. The door in this position is prevented from being closed through the normal action of the check 10, by the overlying bifurcated' portion 25 of theheok 25. case of an emergency, and the electrical apparatus" excited by the closing of the switch conce'aled'in't'he room; the pawl 16jv'vith'its extension release rod 23 will rock, and inasm uch as 'n' raease extension rod 23is normally beneath the hook 25, it will raise the free end of, the latter until the bifi ir me a 25 s "cle'arofthe stud/20. This will p mit th'ddoito freely swing to its dosed position. FOI ObVIOUS reasons 1t may be desirable to close thedo'or Without afi'ectingthe "elect trical elements and with this in view'the handj'release rod 26 is'pro'vided. The' operationofthe latter consists in merely pressih'gjupiVardly upon the 151 01028, whiclrwill 'CIEVJQIIIRSBZ a relative movement of the rele se rod 26 ,in' itsl 'gnid evv ay 27 5 and the upper e'nd of the foriner will icom'pel 'an upward archate movement of the hook 25, thereby lift- 'lng the'ibii'ureatedportion 25 of tlie llatter out ofen'gagement with the stud 20,. The door will thus, "through the action of the door check' 105fniove to its closed aosition. This hand'rel'e'ase, itwill be observed, "may be usedwith any'iof the door checks now iii guse by'simply providingthe stud 20 in a pol'sit ion 'ripon'the 'main' arm 11 so lthat it will engage the hook member 25, 'asshown in Fig. 4. a

I clai'm:'

I 1. In" ineans for controlling an electrically operated locking and releas nghnechanism "for a door clieck, the"combinationwitli an arcuat elv movable main I arm having ratchet teeth v and a 'cam "surface, of a pivot/ally 1. j n e I 4 't y t mounted 'pawl having one end movable lnto the path'of the said ratchet teeth andthe opposite end being provided with a projecting p'ortion movable through a'vert cal plane in Which the, sa d cam s adapted to pass,

and a pivotallyflniountedhook member movable longitudinally through the saidjvertieal pla e andpiovided with a forkedfree, end, one arniofsaid lork being 'irovided with a notch toreceiv'efthecamon ma 5 a and the other a'rn'i "of the fork h aving hn angular projection above the projecting pertionvof the pawl, whereby movement of the ing a vertically and axially movable releassaid pawl to engage with the ratchet teeth ing rod adapted to engage said hook member 10 of the main arm Will operate the hook memto operate the latter and release the notch her to disengage the notch from the said from engagement With the cam substantially cam. as described.

2. A means for controlling an electrically In testimony whereof I have affixed my operated locking and releasing mechanism signature. for a door check according to claim 1, hav- NEWTON L. SCI-ILOSS. 

